EP2582908A2 - Procédé et dispositif de fermeture ou de sécurisation d'un trou de forage - Google Patents

Procédé et dispositif de fermeture ou de sécurisation d'un trou de forage

Info

Publication number
EP2582908A2
EP2582908A2 EP11729561.8A EP11729561A EP2582908A2 EP 2582908 A2 EP2582908 A2 EP 2582908A2 EP 11729561 A EP11729561 A EP 11729561A EP 2582908 A2 EP2582908 A2 EP 2582908A2
Authority
EP
European Patent Office
Prior art keywords
closing
securing
ship
tube
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11729561.8A
Other languages
German (de)
English (en)
Inventor
Edmond D. Krecke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE201010024496 external-priority patent/DE102010024496A1/de
Application filed by Individual filed Critical Individual
Publication of EP2582908A2 publication Critical patent/EP2582908A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0007—Equipment or details not covered by groups E21B15/00 - E21B40/00 for underwater installations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/0122—Collecting oil or the like from a submerged leakage

Definitions

  • the invention relates to a method for closing and / or securing a subterranean borehole and a device for closing or securing a submerged surface
  • Deepwater wells are associated with high risks and that it is difficult to close wells from which uncontrollably a fluid, especially oil escapes. Firstly, the great depth generally makes sealing work difficult. On the other hand, the oil often comes out of the borehole at high pressure, so that even with a solid bell it is not possible to seal the borehole in one go.
  • Patent EP 1067758 Bl is described on the
  • CONFIRMATION COPY Closing of regularly formed test holes designed and not suitable to close a larger hole from which uncontrolled oil escapes.
  • the invention is based on the object to provide a simple, cost-effective method with which even larger holes from which uncontrollably oil escapes, can be safely closed or secured.
  • the invention is already known by a method for
  • the invention relates to a method for
  • the invention is used for closing and / or securing boreholes in petroleum production. But also a use for other leaks,
  • Invention means any under the water surface opening, so also in the form of a defective pipe, etc. meant.
  • the inventive method is for
  • a ship in which a vertical pipe passes through the ship's floor is placed above the borehole.
  • a ship is understood to mean any buoyant body.
  • load cranes and platforms as well
  • buoyant part exists.
  • a non-buoyant container from a catamaran over the Borehole be positioned.
  • the ship may also be referred to as a retractable body.
  • a tube means any device which is at least partially tubular, for example a reverse funnel
  • the vertical pipe is a pipe that runs transversely to the ground on which the ship is to be placed.
  • the tube is vertically arranged so that in particular the oil can be passed through the tube from bottom to top.
  • the tube can also be arranged inclined to the ground or to the vertical.
  • a vertical pipe is also understood to mean a pipe which extends from the underside of the ship through the hull of the ship to the top of the ship, for example from the keel to the deck.
  • the ship or a part of the ship is filled with a hardenable mass.
  • it is intended to fill the ship with liquid cement.
  • dry mass such as dry cement powder to fill and a cement-water mixture, for example by introducing seawater, in the hull on-site
  • Hull mixing devices such as stirrers may be present to provide a sufficiently homogeneous mass.
  • the vertical tube preferably comprises a cone in the lower region, through which the diameter of the tube increases in the lower region, so that larger holes are covered.
  • Invention is provided simply by the fact that the ship is so weighted with the curable mass that it no longer has sufficient buoyancy.
  • the invention is based on the finding that a very large amount of hardenable mass encloses the tube in a very simple manner with great weight and volume. Due to the preferably conical configuration and, as provided in a further embodiment of the invention, a collar, the curable composition goes with the
  • the tube is additionally connected in addition to the bare weight material and / or positive fit with the ground.
  • the invention is further based on the finding that only after the partial hardening of the hardenable mass, in particular of the cement, the pipe can be closed and / or secured and now also withstand the enormous pressure of the petroleum.
  • the invention is based inter alia on the finding that in many cases it is not possible to close the tube or the opening, since the pressure is so high, for example, immediately a channel forms in the seabed, which also has a larger sealing device lapped.
  • a directional control valve can be used in which after placing the tube, the fluid can initially escape further. At a first closed connection of the directional valve then a line for pumping the fluid can be connected. This is easily possible because no fluid escapes from the connection of the directional control valve. Then, the directional valve can be switched so that the fluid now exits from the port which is connected to the conduit for pumping.
  • the opening from which the fluid exits can thus be secured without having to seal the fluid flow. This also allows securing high pressure ports.
  • the closing is done slowly over a
  • Dosing valve so that it does not come to sudden force peaks. It may be, for example, a slide, a throttle valve or the like. Furthermore, the device can be connected with additional safety devices, such as blow-out preventers
  • a withdrawal tube can be connected to the upper end of the tube, and then by opening the valve, the oil can be removed at least partially controlled.
  • the oil can be removed at least partially controlled.
  • hardenable mass is discharged through an openable or removable frame surrounding the vertical pipe.
  • the frame After sinking the ship, the frame may be opened or removed, for example by a sliding mechanism, so that the hardenable mass exits the hull around the pipe.
  • the hull as provided in one embodiment of the invention, may be drained, for example, on feet, and stand so high that the
  • curable mass almost completely leaking from the hull.
  • the tube would have to be separable from the hull.
  • the hull may also connect to the hardenable mass and thus provide additional weight which helps to close the wellbore.
  • the ship is preferably lowered over hawsers to prevent it from lying on its side.
  • the invention further relates to a device for closing a borehole, from which uncontrollably a fluid, in particular petroleum, emerges.
  • the device consists of a ship's hull, which with a
  • curable mass has a vertically piercing the ship's bottom tube and has means to leak the curable material around the pipe around.
  • the ship bottom is preferably open around the pipe and a frame is disposed around the pipe which seals the floating hull. After sinking the ship, this frame can be opened or - as provided in a further embodiment of the invention - also serve as a shaping element for the hardenable mass, so that it does not form a thin layer in a too wide area.
  • the frame can also be lowered downwards out of the hull of the ship.
  • the tube in a further development of the invention, can also be lowered downwards out of the hull of the ship.
  • a hull can be used to apply large quantities of hardenable mass directly to the borehole. It is
  • a hull in particular provided to fill a hull with at least 2000, preferably at least 4000 m 3 curable composition.
  • a hardenable mass may be used which has a density which corresponds approximately to the density of water.
  • the density is in a range of about 0.8 g / cm 3 to about 1.2 g / cm 3.
  • a lightweight concrete can be used.
  • the tube preferably has at the lower end a diameter of at least 1 m, preferably at least 3 m.
  • Opening in the bottom of the ship also referred to as frame, preferably has a diameter of at least 5 m.
  • the curable composition of the attachment by means of a kind of sucking or sucking on a floor, here the seabed.
  • the invention relates alternatively or additionally to the use of a suction box, which is provided in particular for use as a suction cup in a previously described method for closing an opening.
  • the suction box is a retractable body or includes a retractable body.
  • the suction box comprises a plurality of compartments, that is to say at least two compartments which are separate from one another, one compartment being designed to suck off a fluid, and another compartment being designed to be open at the bottom.
  • suction box comprises a plurality of compartments, that is to say at least two compartments which are separate from one another, one compartment being designed to suck off a fluid, and another compartment being designed to be open at the bottom.
  • Means is an assembly having at least one construction for securing and / or supporting the pipe 4 and means for fixing to the seabed.
  • a second or the further compartment which does not serve to suck off or close off the borehole, essentially alone serves for attachment.
  • the further compartment can be evacuated with respect to the environment.
  • the further compartment is evacuated by the water in it is pumped out. Because the inner can sink to the sinking
  • Compartment be filled or filled with water, for example.
  • the suction box with pumps, via which the compartments, which serve the attachment and which preferably around a centrally arranged compartment for sucking off the fluid
  • evacuation does not mean the complete removal of a fluid from the compartments, but merely the generation of a negative pressure relative to the environment.
  • the pumps for evacuation are preferably arranged on the suction box itself. At lower depths, it is also conceivable to evacuate the compartments via a line.
  • the invention comprises the
  • Suction box at least one anchor.
  • suction box edge side with a plurality of anchors, by means of which the suction box can also be secured to the ground.
  • the suction box is primarily used to seal leaks in wells or pipelines in the deep sea. But a use in shallow water is conceivable. Next is also a use for precaution in drilling conceivable in which the suction box can be retrofitted, or as equipment or supplement of new Holes. In particular, an application in the field of promoting gas hydrates is conceivable.
  • the basic principle of the suction box works in a similar way to the method described above for closing openings.
  • a container which is open at the bottom and is additionally open at the top, but
  • this container is firmly and tightly connected to the seabed.
  • suction box or container can also represent an additional securing system, for example in the case of offshore bores, since a protective cover is formed around the tube or the bore with the box.
  • the suction box compartments and / or openings comprise, through which drilling equipment can be performed.
  • drilling equipment for example, this may be a drill or equipment such as a blow-out preventer or a riser.
  • the upper output of the box can be closed, for example by means of a slider, by means of a
  • the invention is particularly suitable to achieve a controllable promotion in gas hydrate degradation.
  • the seabed In the vicinity of the container, the seabed can be sealed with concrete to stabilize it. Geotextiles can be used.
  • the invention further relates to a method for
  • a device which comprises a tube for sucking off a fluid, on the seabed
  • the device comprises at least one downwardly open but upwardly closed container.
  • the downwardly open container is evacuated from the environment, so that it sucks on the seabed.
  • the tube can be closed and a line for pumping the fluid can be attached.
  • modules which are designed as a suction cup for sucking on the seabed are ready to provide at which more
  • FIG. 1 shows the device for closing a borehole 1 in the various operating states.
  • Fig. 1 shows the device for closing a
  • Closing a borehole 1 comprises a ship's hull 2, which, as not shown here, can preferably also be formed closed at the top.
  • the ship's bottom 6 comprises a recess in which a frame 5 is embedded.
  • the hawsers 7 are at one Carrier attached, which on the outside of the
  • Hull is attached and which simultaneously serves to accommodate four feet 9.
  • the device is drained so that the cone 4 is located above the wellbore.
  • the feet 9 ensure that the hull is aligned above the borehole.
  • FIG. 3 shows now how the liquid petroleum 10 exits the tube 3.
  • the device for closing a borehole 1 sits with its feet on the seabed (not shown).
  • the frame 5 is now opened or lowered down so that the existing in the hull reinforced cement can escape next to the tube 3.
  • the cement 12 begins to harden, whereby the pipe is securely fixed on the wellbore.
  • via a throttle valve 11 slowly the
  • FIG. 5 shows a plan view of a suction box 20 according to the invention or a retractable body with a suction device 3 according to the invention.
  • the suction box 20 comprises a plurality of compartments, wherein by way of example eight outer compartments 21 are arranged around a centrally arranged inner compartment 22.
  • Fig. 6 shows the entire suction box 20 of Fig. 5 in a cross section along the axis A-A.
  • the inner compartment 22 in which the tube 3 is mounted is bell-shaped or like.
  • the inner compartment 22 has a greater height than the outer compartments 21.
  • the inner compartment 22 is open at the top and comprises a suction opening 23 for sucking off the fluid.
  • the inner compartment 22 comprises the pipe 3 according to the invention for sucking off the oil (see also FIGS. 7 and 8).
  • the compartments 21 represent the actual suction boxes or means for attachment or suction 30. They are closed at the top and open at the bottom and can be evacuated via the pumps 28 from the environment.
  • the suction box 20 may for example have a size of about 25 m x 25 m.
  • the outer compartments 21 may initially be filled with water or filled in order to be able to sink these and thus the entire device 20. The outer compartments 21 are when the
  • Suction box has reached the sea floor, evacuated and so suck on the ground 40.
  • the suction box 20 presses into the seabed 40, so that in general all outer compartments 21 are sufficiently sealed.
  • the suction box 20 in particular also the ship 2 and / or all other embodiments according to the invention, further comprises anchors 26 arranged at the edge, which winches via a wire rope (not shown) which runs over the guide roller 25 connected is.
  • the anchors can be drained and the suction box 20, in particular also the ship 2 and / or all other embodiments according to the invention, be positioned and fastened by means of the winches 24. Further, the suction box 20, in particular also the ship 2 and / or all other inventive
  • Embodiments eyelets 21 arranged at the edge
  • Embodiments for example, in particular at low flow, or if the depth under water permits this, by means of underwater tugs as
  • Robotic vehicles or submarines take place.
  • the use of underwater tugs, robotic vehicles and / or submarines is preferably at great depths.
  • suction box 20 Another possibility is the suction box 20,
  • Figures 7 and 8 show a detailed spatial view of the inner compartment 22 of Figure 5 in a lateral Top view (Fig. 7) and in a side view of the bottom (Fig. 8).
  • the entire suction box 20 of Figure 5 is without the outer compartments 21 and thus without the actual suction or fastening devices
  • Suction device 3 and the tube 3 according to the invention together with a kind of carrier and / or
  • funnel-like tube 3 is arranged in the center. It has in the illustrated embodiment on the underside an opposite the opening at the top enlarged opening. By way of example, a kind of funnel 3 is formed.
  • the cone has a diameter of about 2 m to 5 m.
  • the tube 3 may also be cylindrical.
  • the tube 3 and the funnel 3 are substantially centered or in the center of the inner
  • the tube 3 should preferably at least 3 m to 4 m below the frame 29 of the inner compartment 22 and / or the arrangement 20 arranged.
  • the support and / or mounting structure for the pipe 3 is formed by beams 29 or comprises beams 29 or frames 29.
  • beams 29 or frames 29 Preferably, it is a sheet steel frame.
  • the frame 29 or the carrier 29 has, for example, a diameter or a wall thickness of 10 mm to 30 mm, preferably of about 20 mm.
  • the edge length of the inner compartment 22 is here about 20 m to 25 m.
  • the carrier 29 may have a
  • the carrier 29 form a kind of grid or Grid structure and / or box, in particular for the tube 3.
  • the carrier 29 are arranged for example at the top and bottom or in the region of the top and bottom of the inner compartment 22.
  • the carriers 29 are partly transverse to each other.
  • the meshes of this grid are chosen here, for example rectangular, so that the carrier 29 parallel or rectangular to each other.
  • the meshes or the two meshes of the grid, through which the tube 3 passes, are here designed such that the upper mesh has an enlarged cross-section with respect to the lower mesh. This can, among other things, the
  • Figures 9 and 10 show the arrangement 22 of Figure 7, each with attached feet 33 or stilts 33.
  • the stiles 33 are each arranged at the corners of the quadrangle 22.
  • the stilts 33 are arranged essentially centrally at the edge lengths of the quadrangle 22.
  • the stilts 33 are height adjustable.
  • the stilts 33 are in a range of in particular about 2 m to 4 m
  • FIGS. 11 and 12 show the use with a suction box 30 (FIG. 11) and with a so-called suction pipe 32 (FIG. 12).
  • FIG. 11 further shows that in FIGS. 7 and 8
  • suction chambers 30 are by fastening means 31 with the carriers 29 of the carrier and / or
  • Suction chambers 30 suction tubes 32 are now used. They are essentially closed at the top. There they only have an outlet opening to which a suction tube is connected. The opening diameter at the
  • Bottom can be in the order of magnitude of dm to m.
  • the quadrangular arrangement or frame construction 22 shown in FIGS. 7 and 8 can, in a further embodiment shown in FIGS. 13 and 14, also be formed as a triangle, preferably equilateral.
  • a triangle allows a simplified adjustment on a plane compared to a quadrilateral.
  • the frame construction 22 may in this case be part of the arrangement 20. But it can also be provided as such and thus alone to be positioned on a wellbore.
  • the features mentioned above in relation to the quadrilateral can be combined with the features mentioned below for the triangle.
  • the edge lengths of the triangle are also in a range of about 20 m to 25 m.
  • the frame construction 22 is a
  • attached pipe 3 can be designed as a cylinder riser and thus without a cone.
  • the diameter of the tube 3 is about 2 m to 5 m.
  • the cylinder 3 protrudes
  • the tube 3 tapers within the height of the frame 29 such that upwards a connection possibility for a valve, for example a three-way valve 11 with a diameter of for example, 30 cm, as well as for the coupling of
  • a valve for example a three-way valve 11 with a diameter of for example, 30 cm
  • height-adjustable stilts 33 are also attached to the triangle per corner or edge, which are in particular adjustable by about 2 m to 4 m in height (see Figure 14).
  • the concrete can in particular be made to a diameter of 20 m to 50 m to allow the formation of a concrete slab 34, here under the frame 29.
  • the concrete slab 34 may have a height of about 2 meters to 4 meters. This is about their weight and strength, the riser 3 force and / or cohesively connect and seal with the well and protect on the seabed 40 with this large concrete diameter against oil and / or gas leaks.
  • This mass 35 is generally filled to a necessary diameter and thickness.
  • the concrete 35 is in particular a fresh, fast-curing and / or fiber-reinforced concrete 35.
  • the concrete 35 has a weight class of greater than or greater than 1,400 kg / m 3 .
  • Concrete plate 36 achieved a strength and tightness to prevent leakage of oil and / or gas.
  • the height of the triangular frame 22 should be between 2 and 5 m.
  • holding devices 39 can be mounted, for example at the three or four edges of the device, which relieve the cables and thus decouple them from the device, so that they are released for retrieving and used several times can be.
  • the first filled concrete 35 (here, for example, in 2 m to 3 m concrete slab thickness 36 and / or about 20 m to 40 m in diameter) may additionally
  • Triangular frame 22 for example, completely and thus to the upper edge, filled (see Figure 17). This serves to additional weighting and stabilization of the tube 3 and / or the riser 37th
  • An underwater camera can be used to precisely determine or monitor positioning above a borehole. For larger ocean currents, however, it is advisable to use centimeter-accurate anchors that have been ejected beforehand, especially with a remote-controlled anchor spill on the triangular frame
  • triangular frame can also be an example 2 m to 4 m high pipe, especially with a
  • This entire economic and relatively light Device can be lowered with steel cables, for example, 1 or 2 work boats or a catamaran.
  • a borehole can be reliably closed in a very simple and inexpensive manner.
  • the devices and methods of the invention are in

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Earth Drilling (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour rendre étanche un trou de forage, duquel s'écoule du pétrole de manière incontrôlée. A cet effet, une coque de bateau est remplie de ciment et la masse de ciment est déposée tout autour d'un tuyau de forme conique, de façon que le tuyau de forme conique soit simultanément fixé et rendu étanche.
EP11729561.8A 2010-06-21 2011-06-20 Procédé et dispositif de fermeture ou de sécurisation d'un trou de forage Withdrawn EP2582908A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201010024496 DE102010024496A1 (de) 2010-06-21 2010-06-21 Verfahren und Vorrichtung zum Verschließen eines Bohrloches
DE102010027530 2010-07-16
PCT/EP2011/003037 WO2011160801A2 (fr) 2010-06-21 2011-06-20 Procédé et dispositif de fermeture ou de sécurisation d'un trou de forage

Publications (1)

Publication Number Publication Date
EP2582908A2 true EP2582908A2 (fr) 2013-04-24

Family

ID=45371870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11729561.8A Withdrawn EP2582908A2 (fr) 2010-06-21 2011-06-20 Procédé et dispositif de fermeture ou de sécurisation d'un trou de forage

Country Status (4)

Country Link
US (1) US8888407B2 (fr)
EP (1) EP2582908A2 (fr)
BR (1) BR112012032808A2 (fr)
WO (1) WO2011160801A2 (fr)

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EP2795035A4 (fr) * 2011-12-19 2016-07-27 Nautilus Minerals Pacific Pty Procédé et système de refoulement
CN105448247A (zh) * 2016-01-04 2016-03-30 京东方科技集团股份有限公司 调制背光源的方法及装置、灯条、背光模组、显示装置
CN112145133B (zh) * 2020-09-25 2021-12-14 中国石油大学(华东) 一种深海海底天然气水合物采集方法及生产大棚

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BR112012032808A2 (pt) 2016-11-08
US8888407B2 (en) 2014-11-18
WO2011160801A3 (fr) 2012-10-04
WO2011160801A2 (fr) 2011-12-29
US20120027519A1 (en) 2012-02-02

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